Closest consumer item I could think of was the "Radio Nurse".
The first baby monitor IIRC.
They built a lot of things over the years like.....
Light ballasts, power supplies for IBM PC's. PC computers, the tubes used
at Arecibo, auto radios, hearing aids, HDTV transmitter accy's.
Its a very long list.
In at least one of the Byrd expeditions they they used Zenith radios for
recievers, dont know about the transmit end. See old QST ads.
Enuf fer now
73 Zeno
LFOD !